Pipe-cutting machine.



G. WALLACE.

PIPE CUTTING MAGHINE.

Patented Sept. 22, 1914.

2 SHEETS-SHEET 1.

APPLIUATION FILED JAN. 17, 1913. '1,1 l 1,336.

G WALLACE v PIPE CUTTING MACHINE.

APPLICATION FILED JAN. 17, 1913. 1,1 1 1,336. Patented 8611.22, 1914.

2 SHEETS-SHEET 2.

45 a fragment of the cutter head;

section on the line l6--6 of Fig. 5; Fig. 7,` aY

' miese:

` Tol'lcom it muy concern f `Be it linownthatl, GEORGE STATESgeEonGEfwALLAcE, or EIAGAA FaLns,NEw XoitK. i y.

PIPE-CUTTING `ivinoisiiivE.

VALLCEa a citizen of 'the United States,` residing at NiagaraFalls, thecounty of Niagara,

State of New York, have invented certain new and useful ImprovementsinlPipe-Cutting Machines; and I do hereby declare the following 4to beafull, clear, and exact dei` j scription of the invention,l such aswillenableothers skilled inthe art towhich it ap- .pertains tomakeanduse the same.

This invention relates t pipe cutting Inalwitheach other andfeXtendingin the same chines. .j The 'object of the invention resides intheprovision ofa pipe cutting machine whichy includes meansfor` supportinga pipe anda rotatable cutter head in which the `cutters are -inountedforinovement `radially of the headand adaptedtdbe automatically fed tothe *work as saidhead is rotated. f

A further objectief the invention resides in the provision ofAad-.machine of the type.

named which will be simplein construction7 efficient fand reliable inuse andj 'which maybe"`manufactured atl comparatively` small cost.

"With the above and other objects in viewl iyheinvention 'consistsiiithe details of con` structionaiid in theparrangement and combination ofparts ton'be hereinafter more fully described and particularljTpointedout i, "in the appended claim.

In describing thefinventionin detail reference will behadto* theaccompanying "drawings wherein likewch'aracters of` reference denotecorresponding:parts in the several views, and Ain `wliich%,`

`Figure 1 is a side elevationof a machine constructed inaccordance'withftlie invention and showing apipe supported thereby vandthe cutting mechanism disposed in operative relation to thepipe;.jl`1ig.:2',. a section: onthe` j line 2-2 of Fig. 1; Figyasectionon the Aline 3-3 of Fig. y2; Fig.v 45a" section on the line 1- of Fig.1; Figjj, a front view of Fig. 6, a

j The pipe supportingelement A isY shown` as comprising'a table whichincludes legs 10 'and 11 anda top memberl2fconnecting the lApplicationrliedraimary17,1913.` serial No. 742,717.

spcification of Letters Patent. j Pf'efd Sept, 22, 1914,

upperends of said legs. The top member 12 iis provided with a transversegroove 13 the `endsfof `which are Vclosed byplates 14 proi,videdyvithysuitable bearingopenings 15 disposed in' alinement with each other..`Slidably'mounted in the groove 13 are the lower ends of cooperating pipeholding jaws 16` and 1f?, said lower ends of the jaws 16 and 17 being ofa shape correspondingto the groove `13. The lower ends of `thesejaws 16.and 17 are vprovidedwith threaded passages '18 and 19 respectivelydisposed in alinement l'direction as the groove 13,` the threads of thepassage 18'being right hand threads, while those oi'ithep'assage 19 vareleft hand threads. Rotatably mounted in the openings 15 of the plates 14`are `the ends of a screw 20,one'

portion of said screw being threaded on so `as to correspond with the`threads of the passage 18, lwhile the other portion of said screw isthreaded to correspond with the threads of the passage 19. Mountedonrthe end of the `screw 20 eXteriorly of and adjacent one ofthe plates14 is a head 21in which is slidablymounted Aangoperating handle 22; By

this construction it` willbe apparent that upon rotating the shaft`20`in one direction through the medium of the handle 22 the jaws `1G andlfwill be `moved toward each other` and into clamping relation withrespect to a pipe disposed between' said j aws', while thereverserotation of the shaft 20 will movethe jaws 16 and 17 away from:each other to'releasela pipe clamped therebetween. Projecting laterallyfromthe lower ends of the -legs 10 and 11 parallel toithe longitudinalaxis of the machine are guidelextensions :23. ""l`he innerfaces of whichare provided vwith longitudinal grooves 24. j The purpose of thesefguideextensions 23 will be presently apparent.. The pipe cutting mechanism Bis shown |as comprising a ring formed of.semi-circu `lar sections 25and`26 suitably bolted together at their meeting ends `as at'27.Depending from the sections 25 and 26 at corresponding points are legs28 `and 29 respectively each of which provided with a lateral.,extension` 30 projecting respectively into the grooves 24 whereby thecutting mechanism is slidably supported by Athe guide extensions 23 formovement toward and away from the pipeholding element A.

The inner sides of the sections 25 and 26 are -convexed as at 31 vandprovided at intervals with recesses 32 in which the latter are.

disposed ball bearings 33. Disposed within the ring formed by thesections 25 and 26 is a circular head' 34 the periphery of which isconcaved as at 35 to receive 'the convex inner sides of the ringsections 34 and bearing upon the ballsv 33 so that saidhead may berotated within the ring formed by the sections 25 and 26 with theapplication of very little power. The' head is provided .centrally witha major opening 36, and `the wall of this opening 36 is provided with aplurality of .recesses 37 disposed lradially with respect to the head34.` Mounted each of the recesses 37 adjacent the inner end of thelatter is `a bearing plate 38 provided with a central opening-39.Extending through the opening 39 of each bearing plate is a cutter feedscrew 40 the outer end of which is rotatably supported in a socket 4lformed in the inner wall of the recess 3T. Fixed upon the-screw 40between the plate 39 and the inner end -of the. recess 37 is a pinion 42for a purpose that will presently appear. l y

outwardly of the plate 33 are provided respectively with grooves 43 inwhichis slidably mounted a cutter carrier 44. 'I he inner end of thisvcarrier 44 is provided with a threaded recess 45'in which is engaged theadjacent screw 40. The outer end of the carrier 44 terminates in spacedears 46 between which is rotatably mounted a disk cutter 47. By thisconstruction it willbe apparent that upon vthe rotation of one of thescrews 40 in one-direction its associated carrier willbe moved towardthe center ofthe head 34, vwhile the reverse rotation of said screw willmove the carrier away from the center ofthe head 34. Mounted upon theringv section 25 is a'plate 48 provided with an' extension 49` whichoveilies the head 34. The free end of this extension 49 is enlareed asat 50 and )rovided at 'its under side with rack teeth 5l adapted tooperatively engage the pinion 42 as the head 34 is rotated and in thismanner automaticallyf feed the carriers 44 toward the center i "of thehead 34 during the rotation of the The side walls of each recessv 37latter. Projecting from the head 34 at suitable intervals are handles 52through the medium of which iently rotated.

the head may be convenf. n

In the use of themachine the pipe to be g cut is secured between thejaws16l andA 17v in the manner heretofore referred Ito and the head 34 ofthe cutting mechanism is then rotated in the proper direction to movethe carriers 44 away from thecenter ofthe .v 42 and the rack teeth 5l;`VVhenvthe carriers head by the coperationibetween the pinion 44 havemoved .the required distance from the center of the head 34 the cuttingmechanism isadjusted toward` the pipe holding element so as to disposethe pipeto be cut between the cutting disks 47. The-head 34 is thenrotated so as to feed the carriers 44 toward the center of the head34-and during this operation the'` cutters 47 lwill sever the pipe aswill be obvious.A

`What I claim is In a pipe cuttinglmachine, 'means for supporting apipe, pipe cutting means comprising a ring, a circular head rotatablymounted 1n said ring provided with Aa central opening and a plurality ofradial recesses communicating with said opening,`

recess, bear-A cutter carriers slidably mounted lineach ing :platesmounted'on the head and spanning said recesses respectively, feed screwsrotatably mounted in said' bearing platesrespectively and havingcorresponding ends Irotatably engaged in sockets formed in the innerwall of said recesses and their other end operatively connectedwith saidcarriers whereby the rotation ofsai,dscrews will movesaid carriersrespectively toward the center of the head, and means `for successivelyrotating said screws toA move said car-` duringriers toward the centerofthe vhead the rotation of the latter.

In testimony whereof, lIaflix my signa-`v ture, in the presence oftwowitnesses.

- esoneri WALLACE Witnesses: l. XVILLIAM LWALLAQE,

TRUE GinMAiv. j

Copies of thispatent may be obtained for five cents each, by addressingthe f Commissioner of Patents',

wnhingtnn, n. c.

